As a key material in the field of industrial catalysis, the advantages of alumina carrier are mainly reflected in the following aspects:

1、 Advantages of physical structure

High specific surface area and pore structure

Alumina support has porosity and high dispersibility, with a specific surface area of 10-100 m ²/g, which can provide a large number of active sites and promote the uniform dispersion of catalyst active components. Its pore structure can be adjusted (pore size range from<2 nm to micrometer level) to meet different reaction requirements. For example, the coarse pore structure can reduce deep oxidation side reactions, while the fine pores are conducive to the stability of highly dispersed catalysts.

morphological diversity

Aluminum oxide carriers can be made into different shapes such as spherical, strip-shaped, honeycomb shaped, etc., and are suitable for various reactor designs such as fixed beds and fluidized beds. For example, microsphere shaped carriers are suitable for fluidized beds, while irregular shaped carriers (such as tri leaf or fibrous) can optimize the diffusion path of reactants.

2、 Chemical performance advantages

Thermal stability and chemical stability

Aluminum oxide supports can maintain structural stability even at high temperatures (such as 1200 ℃) and in acidic and alkaline environments. For example, alpha alumina can maintain a low specific surface area at high temperatures, making it suitable for high-temperature reactions such as ethylene oxidation to produce ethylene oxide.

Surface acidity control

Transition state alumina (such as γ - Al ₂ O3) has B acid and L acid sites on its surface, which can synergistically form bifunctional catalysts with active components. Doping with negative ions such as halogens can enhance acidity and promote reactions such as cracking and isomerization.

3、 Advantages of functional expansion

Energy storage and adsorption performance

Aluminum oxide carrier has high specific surface area and chemical stability, and can be used as an electrode material for supercapacitors and lithium-ion batteries. Its adsorption capacity is also applicable to gas drying (such as acetylene, hydrogen) and wastewater defluorination.

Easy to regenerate

Activated alumina carriers can remove pollutants through high-temperature calcination or solvent washing, restore catalytic performance, and reduce usage costs.

4、 Widely applicable scenarios

Chemical industry: petroleum reforming, hydrogenation desulfurization, organic synthesis, etc.

Environmental protection field: exhaust gas treatment (such as catalytic reduction of NOx), water purification.

In the field of new energy: lithium-ion battery cathode materials, solar cell modules.

In the field of electronics and materials: high-voltage insulators, ceramic reinforcement materials, nano coating additives.